Regenerator-furnace



(No Model,)- 1 2 SheetsSheet 1.

, w. S. MGKENNA.

' REGENERATOR: FURNAGE.-

No. 814,861. 1 Patented Mar 31, 1885.

ATTOR/VEVJ (No Model) 2 Sheets- Sheet 2.

W. MQKENNA.

REGENEBATOR FURNACE.

No. 314,861. Patented Mar. 31, 1885.

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A UNITED STATES PATENT OFFICE.

WILLIAM S. MGKENNA, OF PITTSBURG, PENNSYLVANIA.

REG ENERATOR-FURNACE.

SPECIFICATION forming part of Letters Patent No. 314,861, dated MIareh31, 1885.

Application filed July F, 1884.

T 0 all whom it may concern:

Be it known that I, WILLIAM S. McKENNA, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented certain 5 new anduseful Improvements in Regenerator- Furnaces; and I do hereby declarethat the following is a full, clear, and exact description of theinvention,whioh will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, which form a part of this specification.

In regulating furnacesit has been found that natural gas may beeconomically used as a heating agent, and various methods have beenemployed with a view to economy and efficiency. Among other methods ithas been proposed to lead the gas in below the checkerwork on each sideof the furnace, mixing it with the air and burning it in its passagethrough the checker-work. This method is objectionable for the reasonthat the checkerwork is soon burned out by the gas, and for the furtherreason that the gas is partially consumed before reaching the properpoint t. e., the furnace-chamber. In the method just described, it willbe observed, the gas is regenerated with the air in the checker-work.This heating or regeneration of the gas. aside from the danger to thechecker-work, caused, as aforesaid, by the burning of the gas, isunnecessary when natural gas is to be had.

My invention has relation to regeneratingfurnaces, and has for itsobject the provision of means for utilizing gas as a heating agent in amore economical and effective manner than has heretofore been done.

My invention has for its further object the provision of means forpreventing injury to the checker-work by the flame passing-therethroughafter leaving the furnace.

My invention consists in the novel construction, combination, andarrangement of parts, as hereinafter described, and specificallyclaimed.

Referring to the accompanying drawings, Figurel is a longitudinalvertical section of a regenerating-furnace constructed according to myinvention; Fig. 2, a vertical cross-section;

Fig. 3, a similar section; Fig. 4, a sectional detail of the device forprotecting the side walls (N0 model.)

On each side of the chamber A is a bridge,

0, whose upper portion is lattice or check work, as shown, and whose topis formed with an arch concentric with the lateral arching of thechamber A, and a short distance from bridge 0 is a wall, D, also archedon top to correspond with the lateral arch of the furnace, but built upsolidly, leaving a space, E, between it and the bridge 0. Near thebottom of space E, entering at the front of the furnace and extending toor almost to the back thereof, is the gas-pipe, F, and on both sides ofsaid gas-pipeare the double walls of a cooling-fiue, G,which will bemore fully de scribed hereinafter.

H designates the portion of the furnace containing the checker-work,andIthe said checker-work contained therein. K is the top of thechecker-work chamber, arched in similar manner to the heating-chamberAand joining the latter at a point, a, directly over the bridge-wall O.

In addition to the double arch, the top of the chambers containing thechecker-work is slightly inclined from the end wall, L, of the furnaceto the top of the heating-chamber. A supplemental arched top, M, isformed in the checker-work chamber H, extending from the wall D to nearthe end wall, L, leaving a narrow space, N, for the entrance and exit ofair. The arch M is concentric with the top H, and is placed somedistance above the top of the checker-work, leaving a space, 0, over thesame, so as to permit of the ready egress of the air from thechecker-work.

P designates the air-flue leading to the airvalve or butterfly Q at theend of the furnace, and R the flue leading from said airvalve to thestack S. It will be not-ed that the fines P are beneath the body of thefurnace, and that the fine R, leading to the stack, is beneath the finesP P. Referring now to the diagram shown in Fig. 5 of thedrawings,wherein H represents one of the checker-work chambers and H thechamber on the other side of the furnace, it will be observed that thefines P P from the checker-work chamber lead directly from the center ofsaid chamber to the two ends of the air-valve or butterfly Q, the objectof such arrangement being to cause the air to ascend in the middle ofthe checkerwork, thereby insuring an equal distribution of the air tothe latter.

Referring now to Fig. 4 of the drawings,

illustrating the device for shielding the gaspipe and the wallscontiguous thereto, said device consists of a A-shaped box of cast-iron,having'double walls 9 g and bottom plate, 9. The box G extends entirelythrough the furnace from front to back, being built into the front andrear walls, having its center bricked up around the.gas-burner and atthe opposite end. The space between the double walls g g is open at eachend, and permits of a free circulation of air therethrough.Barsg'ggcross over the open top of box G, being cast therewith, at ashort distance apart.

The operation of my invention is as follows: The gas being ignited andthe air being ad mitted to, say, the checker-work on the lefthand sideof the heating-chamber, the air ascends through the checker-work intothe space 0 and passes through the spaceN at the end of arch M,andthence along through the space between the arches K and M, strikingagainst and mingling with theburning gas at the point a, forcing thesaid gas over the-bridge-wall O and through the spaces in said bridge tothe heating-chamber A. After the gas has done its work in chamber A itpasses off between the arches K and M, over the checker-work on theright-hand side of the heating-chamber, down through the slitN at theend of the checker-work, thence through the checker work to the flue P,and through said flue to the air-valve Q, and thence to the stack S byway of flue B. After a certain interval the air-valve Q is reversed,admitting air to the flue of the right-hand checker-work and connectingthe left-hand checker-work to the smoke-flueR. The gas on the letthandside of the heating-chamber is now turned off, and

- the gas on the right-hand side is ignited and veying space betweensaid checker-work chambers and the heating chambers, of main arches andsupplemental arches located over said checkenwork chambers, and leavinga direct passage between them from the combustionchamber to thechecker-work chambers, said supplemental arches being elevated above thelevel of the floor oti l he conibustion-chamber, substantially asdescribed.

2. in a regeneratingfurnace, the combina tion,with aheating-chamber, A,having checker-work chambers H H on each side, of dues P P, leading fromthe centers of said checkerwork chambers diagonally to the two ends ofan air-valve, Q, substantially as described.

3. In a regenerating-furnace, the combination,witl1 a heatingchamberhaving an arched top, checker-work chambers on each side, havingsimilarly-arched tops, of a bridge-wall whose tops are archedconcentrically with the arch of the heating-chamber, substantially asdescribed.

4. In a regenerating'furnace adapt-ed to use gas as a fuel, thecombination, with a gas pipe, of a box having double walls wilhair-spaces between on each side of said pipe and in full communicationwith the external atmosphere, substantially as described.

5. in a regenerating-furnace adapted to use gas as fuel, the combinationof heating-chamber A, perforated bridge-wall G, and space E for thereception of gas-conveying pipe F, supplemental arch M. having space Nat the end,with checkerwork l, flue P, and air-valve Q, all constructedand arranged substantially as described. 7

In testimony that I claim the foregoing I have hereunto set my hand,this 2d day of

